IEEE Geoscience and Remote Sensing Magazine - March 2014 - 8
globe-© cartesia, plane-©1995 expert software, inc.,
satellite-wikimedia commons/richard-59
UAS-Based Radar Sounding
of the Polar Ice Sheets
C. LeusChen, R. haLe, s. KeshmiRi, J.B. Yan, F. RodRiguez-moRaLes,
a. mahmood, and s. gogineni
Center for Remote Sensing of Ice Sheets, University of Kansas,
Lawrence, Kansas, United States
Abstract-Both the Greenland and Antarctic ice sheets
are currently losing mass and contributing to global sea
level rise. To predict the response of these ice sheets to a
warming climate, ice-sheet models must be improved by
incorporating information on the bed topography and
basal conditions of fast-flowing glaciers near their grounding lines. High-sensitivity, low-frequency radars with 2-D
aperture synthesis capability are needed to sound and image
fast-flowing glaciers with very rough surfaces and ice that
contains inclusions. In response to this need, CReSIS developed an Unmanned Aircraft System (UAS) equipped with
Digital Object Identifier 10.1109/MGRS.2014.2306353
Date of publication: 8 April 2014
8
a dual-frequency radar that operates at approximately 14
and 35 MHz. The radar transmits 100-W peak power at a
pulse repetition frequency of 10 kHz, operates from 20 W
of DC power, and weighs approximately 2 kg. The UAS has
a take-off weight of about 38.5 kg and a range of approximately 100 km per gallon of fuel. We recently completed
several successful test flights of the UAS equipped with the
dual-frequency radar at a field camp in Antarctica. The radar
measurements performed as a part of these test flights represent the first-ever successful sounding of glacial ice with a
UAS-based radar. We also collected data for synthesizing a
2-D aperture, which is required to prevent off-vertical scatter, caused by the rough surfaces of fast-flowing glaciers,
2168-6831/14/$31.00©2014IEEE ieee Geoscience and remote sensing magazine
march 2014
Table of Contents for the Digital Edition of IEEE Geoscience and Remote Sensing Magazine - March 2014
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